'frosted’ plastic reflects light away from the solar cells; clean, clear solar cells can capture much more light. Clear nail polish is perfect for rejuvenating plastic-covered solar cells that have become weathered and dull.
Made suet cakes, came up with my own 'recipe' . The birdies LOVED IT! Better than store bought. Used ham fat I rendered, would not recommend for summer months. May get messy! How to make homemade suet cakes for the birds.